Like the other Apollo astronauts I've met Worden would rather talk about the mission and its achievements, than himself. As the first of the so-called "J" class missions, Apollo 15 is widely accepted as the most scientifically rigorous of the Apollo programme. Nevertheless, as we sit down in a quiet corner of the hotel bar, with proposals out there for a return to the Moon and missions to Mars, I'm keen to learn about the human experience of being so far from home...